samperi@marob.masa.com (Dominick Samperi) (10/09/89)
The documentation on metafont that comes with the TeX dist. is not complete (just a readme file). In particular, it is not clear how to make a set of pk files for white write devices. The readme file on white write devices gives a few hints, but it is not clear how to apply them. Would somebody please comment on how to generate pk files for white write devices. I guess it involves using commands like: mf "\mode=write_white; mag=1.22; input cmr10", but I'm not sure... -- Dominick Samperi -- Citicorp samperi@Citicorp.COM uunet!ccorp!samperi
eykhout@kunivv1.sci.kun.nl (Victor Eijkhout) (10/09/89)
Write-white is an eternal problem, i.e., at coarse resolutions like 300dpi. It seems the Oce6750 is write-white, but at 500dpi it is just beautiful. If there is no mode-def for your favourite engine, fiddle around a bit, and read the article on write-white troubles in Tugboat, a while back (can't find the reference right now, but just leaf throught this year, last year, maybe the one before that). Good luck, Victor.
rusty@GARNET.BERKELEY.EDU (10/11/89)
I think the following is included with the Unix Tex distribution; put
it in the file white_setup.mf. At the end is a sample mode_def.
% The basic correction for write-white fonts occurs in the definition
% font_setup. This can be used to overwrite the write-black
% definition in cmbase.mf
%
def white_setup =
if monospace: let adjust_fit=mono_adjust_fit;
def mfudged=fudged enddef;
mono_charic#:=body_height#*slant;
if mono_charic#<0: mono_charic#:=0; fi
mono_charwd#:=9u#; define_whole_pixels(mono_charwd);
else: let adjust_fit=normal_adjust_fit;
def mfudged= enddef; fi
if math_fitting: let math_fit=do_math_fit
else: let math_fit=ignore_math_fit fi;
define_pixels(u,width_adj,serif_fit,cap_serif_fit,jut,cap_jut,beak,
bar_height,dish,bracket,beak_jut,stem_corr,vair_corr,apex_corr);
define_blacker_pixels(notch_cut,cap_notch_cut);
forsuffixes $=notch_cut,cap_notch_cut: if $<3: $:=3; fi endfor
define_whole_pixels(letter_fit,fine,crisp,tiny);
define_whole_vertical_pixels(body_height,asc_height,
cap_height,fig_height,x_height,comma_depth,desc_depth,serif_drop);
define_whole_blacker_pixels(thin_join,hair,stem,curve,flare,
dot_size,cap_hair,cap_stem,cap_curve);
define_whole_vertical_blacker_pixels(vair,bar,slab,cap_bar,cap_band);
define_corrected_pixels(o,apex_o);
forsuffixes $=hair,stem,cap_stem:
fudged$.#:=fudge*$.#; fudged$:=hround(fudged$.#*hppp+blacker);
forever: exitif fudged$>.9fudge*$; fudged$:=fudged$+1; endfor endfor
rule_thickness:=ceiling(rule_thickness#*hppp);
heavy_rule_thickness:=ceiling(3rule_thickness#*hppp);
oo:=vround(.5o#*hppp*o_correction)+eps;
apex_oo:=vround(.5apex_o#*hppp*o_correction)+eps;
lowres_fix(stem,curve,flare) 1.3;
lowres_fix(stem,curve) 1.2;
lowres_fix(cap_stem,cap_curve) 1.2;
lowres_fix(hair,cap_hair) 1.2;
lowres_fix(cap_band,cap_bar,bar,slab) 1.2;
stem':=hround(stem-stem_corr); cap_stem':=hround(cap_stem-stem_corr);
vair':=vround(vair+vair_corr);
vstem:=vround .8[vair,stem]; cap_vstem:=vround .8[vair,cap_stem];
ess:=(ess#/stem#)*stem; cap_ess:=(cap_ess#/cap_stem#)*cap_stem;
dw:=(curve#-stem#)*hppp; bold:=curve#*hppp+blacker;
dh#:=.6designsize;
stem_shift#:=if serifs: 2stem_corr# else: 0 fi;
more_super:=max(superness,sqrt .77superness);
hein_super:=max(superness,sqrt .81225258superness); % that's $2^{-.3}$
clear_pen_memory;
if fine=0: fine:=1; fi
forsuffixes $=fine,crisp,tiny:
%%% fine $ %%%% temporary formatting convention for MFT
if $>fudged.hair: $:=fudged.hair; fi
$.breadth:=$;
pickup if $=0: nullpen else: pencircle scaled $; $:=$-eps fi;
$.nib:=savepen; breadth_[$.nib]:=$;
forsuffixes $$=lft,rt,top,bot: shiftdef($.$$,$$ 0); endfor endfor
%%% @ $ %%%% restore ordinary formatting for $
min_Vround:=max(fine.breadth,crisp.breadth,tiny.breadth,2); % "WRITE WHITE" ONLY!
if min_Vround<vround min_Vround: min_Vround:=vround min_Vround; fi
if flare<vround flare: flare:=vround flare; fi
forsuffixes $=vair,bar,slab,cap_bar,cap_band,vair',vstem,cap_vstem,bold:
if $<min_Vround: $:=min_Vround; fi endfor
pickup pencircle scaled rule_thickness; rule.nib:=savepen;
math_axis:=good.y(math_axis#*hppp);
pickup pencircle scaled if hefty:(.6[vair,fudged.hair]) else:fudged.hair fi;
light_rule.nib:=savepen;
pickup pencircle xscaled cap_curve yscaled cap_hair rotated 30;
cal.nib:=savepen;
pair cal.extension; cal.extension:=(.75cap_curve,0) rotated 30;
pickup pencircle xscaled cap_curve yscaled cap_hair rotated 70;
tilted.nib:=savepen;
pickup pencircle xscaled curve yscaled cap_hair rotated 70;
med_tilted.nib:=savepen;
pickup pencircle xscaled cap_stem yscaled cap_hair rotated 30;
med_cal.nib:=savepen;
pickup pencircle xscaled stem yscaled cap_hair rotated 30;
light_cal.nib:=savepen;
pickup pencircle xscaled(cap_curve+dw) yscaled cap_hair rotated 30;
heavy_cal.nib:=savepen;
bot_flourish_line:=-.5u-o;
pair bend; bend=(.5u,0);
pair flourish_change; flourish_change=(4u,.2asc_height);
join_radius:=u;
currenttransform:=identity slanted slant
yscaled aspect_ratio scaled granularity;
if currenttransform=identity: let t_=relax
else: def t_ = transformed currenttransform enddef fi;
numeric paren_depth#; .5[body_height#,-paren_depth#]=math_axis#;
numeric asc_depth#; .5[asc_height#,-asc_depth#]=math_axis#;
body_depth:=desc_depth+body_height-asc_height;
shrink_fit:=1+hround(2letter_fit#*hppp)-2letter_fit;
if not string mode: if mode<=smoke: shrink_fit:=0; fi fi
forsuffixes $=thin_join,hair,curve,flare,dot_size,cap_hair,cap_curve,
vair,bar,slab,cap_bar,cap_band,stem',cap_stem',vair',fudged.hair,
fudged.stem,fudged.cap_stem: $:=max($,2); endfor % "WRITE WHITE" ONLY!
enddef;
% if a mode_def includes the statement:
% let font_setup = white_setup
% it will replace the cmbase.mf font_setup with this corrected version.
%
% put
% input white_setup
% in your local.mf file (the one that's \input after plain.mf).
%
% Ricoh 4080: for the TI Omnilaser (Stan Osborne's values TUGboat 8,2,134)
% mode_def RicohFortyEighty =
% let font_setup = white_setup; % use the write-white font_setup
% proofing := 0; % no, we're not making proofs
% fontmaking := 1; % yes, we are making a font
% tracingtitles := 0; % no, don't show titles at all
% pixels_per_inch := 300; % Ricoh write-white engine.
% blacker := 0.2; % Don't overblack the small fonts
% fillin := -0.2; % reverse comp. for diagonal fillin
% o_correction := 0.5; % but don't overshoot as much
% enddef;